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Cash and Receivables Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Jun. 28, 2020	Dec. 29, 2019	Jun. 30, 2019	Dec. 30, 2018
Cash and Cash Equivalents
Cash	$ 202,939	$ 185,203
Cash equivalents		114,992
Cash and cash equivalents	338,002	300,195
Restricted cash and cash equivalents, current	30,606	34,539
Total restricted cash and cash equivalents, current	71,456	58,512
Total cash, cash equivalents and restricted cash	409,458	358,707	$ 484,346	$ 486,512
Restricted cash
Cash and Cash Equivalents
Restricted cash and cash equivalents, current	30,606	34,539
Restricted cash \| Accounts held by trustee for the securitized financing facility
Cash and Cash Equivalents
Restricted cash and cash equivalents, current	30,274	34,209
Restricted cash \| Other
Cash and Cash Equivalents
Restricted cash and cash equivalents, current	332	330
Advertising funds restricted assets
Cash and Cash Equivalents
Restricted cash and cash equivalents, current	$ 40,850	$ 23,973